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      03-26-2019, 03:24 PM   #1
Blue2
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AutoX tire pressure on stock PSS tires?

What is the optimal autocross tire pressure on the stock PSS tires? I have the staggered PSS setup.

Thanks for any advice!
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      03-26-2019, 03:44 PM   #2
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32 psi. Not enough time to warm up more in my opinion.
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      03-26-2019, 05:20 PM   #3
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Originally Posted by 5.M0NSTER View Post
32 psi. Not enough time to warm up more in my opinion.
Thank you. 32 PSI all around or do you suggest different front/back?
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      03-26-2019, 07:34 PM   #4
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I ran higher in rear and softer in front by 4 psi. Used chalk to mark tires on my first autocross run, and looked how far the tires were rolling over. Then I Reduced the front pressure to 32psi and the roll over the side was nearly perfect on both. Was a cooler day though and cool pavement. Note I’m on 265/35r19 fronts star spec PSS and 285/35r19 rear PSS regular spec. I’ll continue to use chalk on first run to see what I need to adjust. For me it’s easier to go down in air than up as my pump is slow. So I start at 36
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      03-27-2019, 08:59 AM   #5
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I would probably keep 32psi in all 4 corners. To me the handling balance is damn near perfect from the factory.

But you could get a bit more grip by dropping more, and then you have to chose front wheels if you want less understeer or rear if you want less oversteer. But the impact of these changes won't be easy to feel.
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Last edited by 5.M0NSTER; 03-27-2019 at 09:34 AM..
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      04-24-2019, 09:39 AM   #6
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Where does the M2C (stock) class for autocross?
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      04-24-2019, 09:42 AM   #7
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Where does the M2C (stock) class for autocross?
A-street.
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